Meteobridge Security Flaw CVE-2025-4008 Under Active Attack, Patch Now

meteobridge

CISA has flagged a new high-severity vulnerability in Meteobridge devices that is currently being exploited in real-world attacks. The flaw, tracked as CVE-2025-4008 with a CVSS score of 8.7, affects Smartbedded Meteobridge, a popular system used for managing weather station data.

This alert was published in CISA’s Known Exploited Vulnerabilities (KEV) catalog, a list of security weaknesses that attackers are actively using to compromise systems. By placing CVE-2025-4008 on this list, CISA is sending a clear warning to organizations, administrators, and individual users: patching this flaw should be treated as a top priority.

According to security researchers at ONEKEY, who discovered and reported the flaw in February 2025, the issue lies in the Meteobridge web interface. This interface is designed to allow administrators to collect weather data and control their devices through a web application that relies on CGI shell scripts and C programming.

Unfortunately, the developers implemented an insecure function call known as eval, which made the system vulnerable to command injection attacks. Attackers can send specially crafted requests to the vulnerable CGI script (/cgi-bin/template.cgi) and execute arbitrary commands on the device.

For example, researchers demonstrated a proof-of-concept exploit using a simple curl command that allowed them to inject malicious code remotely. Because this script is hosted in a public directory with no authentication required, attackers do not even need login credentials to exploit it.

The most concerning part of CVE-2025-4008 is that it grants attackers root-level privileges. This means that once exploited, a hacker gains complete control of the affected Meteobridge device. With elevated access, attackers could install malware, pivot into connected networks, or use the compromised device for further attacks.

Security researcher Quentin Kaiser also highlighted that remote exploitation can be achieved through something as simple as a malicious webpage. Since the vulnerable script accepts GET requests without requiring custom headers or tokens, attackers can trick victims into clicking a link or even viewing a malicious image (<img> tag) that contains an exploit. This makes the flaw a powerful tool for phishing-style attacks.

Recognizing the seriousness of this vulnerability, CISA has mandated Federal Civilian Executive Branch (FCEB) agencies to apply security updates by October 23, 2025. While this deadline applies specifically to federal agencies, private organizations and individual Meteobridge users are strongly advised to update their systems immediately.

The vulnerability has been patched in Meteobridge version 6.2, released on May 13, 2025. Any devices running older versions remain at risk.

cisa

Alongside CVE-2025-4008, CISA has also added four other well-known and high-risk flaws to its KEV catalog, highlighting that attackers continue to exploit old vulnerabilities in addition to new ones. These include:

  • CVE-2025-21043 (CVSS 8.8) – Found in Samsung mobile devices, this out-of-bounds write flaw in libimagecodec.quram.so allows remote code execution.
  • CVE-2017-1000353 (CVSS 9.8) – A Jenkins vulnerability involving deserialization of untrusted data, leading to remote code execution.
  • CVE-2015-7755 (CVSS 9.8) – Juniper ScreenOS improper authentication flaw, enabling unauthorized administrative access.
  • CVE-2014-6278 (Shellshock, CVSS 8.8) – The infamous GNU Bash command injection vulnerability, still actively abused after more than a decade.

By re-adding older vulnerabilities like Shellshock to the KEV list, CISA emphasizes that unpatched systems remain a persistent target for cybercriminals.

If you are using a Meteobridge device, you should:

  1. Update immediately to Meteobridge version 6.2 or later.
  2. Check your logs for any unusual activity that could indicate exploitation attempts.
  3. Restrict access to the Meteobridge web interface by limiting exposure to the internet wherever possible.
  4. Educate users about phishing risks, since attackers may attempt to exploit the flaw via malicious links.

The discovery and active exploitation of CVE-2025-4008 in Meteobridge devices is a reminder that even niche IoT and weather data management tools can become targets for cyberattacks. With remote command execution possible without authentication, this vulnerability poses a severe risk to individuals, businesses, and agencies relying on Meteobridge systems.

CISA’s urgent call for updates, combined with its inclusion of several other critical flaws in the KEV catalog, underscores a broader truth: patch management remains one of the most critical defenses against cyber threats.

Organizations should move quickly to install security updates, strengthen monitoring, and ensure that older vulnerabilities are not left unpatched. With active exploitation already underway, delaying these actions could open the door to serious security incidents.


Follow us on Twitter and Linkedin for real time updates and exclusive content.

Scroll to Top